That's true, they probably would want to test the person to see if opioids are effective, they would probably also want to try and implant stimulator to see if that's effective before they put the pain pump in. They could determine which drug they should use by employing genesight testing. This testing predicts what drugs you are able to digest if you will based on your genes and known markers. The fact that a person had not used opioids would make them an excellent candidate for the pain pump because they don't have a built-up tolerance and they could start with really minuscule doses. Remember one mg of anything taken by mouth compares to 1 mg via the pain pump having the effect of 300 mg by mouth. The pain pump for the person who's never used opioids would have a much longer effective range in years. They can only turn it up so far or they run the risk of flooding the pain receptors and have the opioid exchange from something that relieves pain to something that creates incredible pain. I can't imagine why someone would not be a good candidate for a pain pump unless they're Jean type means that they can't digest opioids at all. Even people who have really bad side effects from opiates can use the pain pump because they don't have to run it through their stomach in their digestive system. Remember no side effects as the kind you get in your bowels from ingesting opioids.